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Related Experiment Videos

Central versus lateral presentation in hemispheric sentence processing: a paradoxical finding.

Jeffrey Coney1, Kerry Judge

  • 1Murdoch University, Western Australia, Australia. J.Coney@murdoch.edu.au

Neuropsychologia
|August 8, 2006
PubMed
Summary

The right hemisphere may play a role in sentence comprehension, but direct evidence is limited. This study used cross-modal lexical priming to investigate hemispheric language processing, revealing surprising patterns of activation.

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Area of Science:

  • Neuroscience
  • Psycholinguistics
  • Cognitive Science

Background:

  • The right cerebral hemisphere's role in complex language processing remains debated.
  • Distinguishing lexical from message-level activation is challenging in hemispheric studies.

Purpose of the Study:

  • To investigate hemispheric contributions to sentence comprehension using cross-modal lexical priming.
  • To differentiate direct lexical activation from syntactic reactivation by anaphora.

Main Methods:

  • Auditory sentence presentation with simultaneous visual word probes.
  • Cross-modal lexical priming (CMLP) procedure.
  • Presentation of visual probes to left visual field (LVF), right visual field (RVF), and central visual field.

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Main Results:

  • LVF probes showed activation immediately after the target word.
  • RVF probes exhibited activation three words downstream.
  • Central probes showed activation at all sampling points, particularly with anaphora, while lateral probes did not.

Conclusions:

  • Hemispheric processing of language, especially complex structures, may require collaborative processing.
  • Simultaneous bilateral stimulation might be crucial for high-level integrative mechanisms in language comprehension.